Boyds Fuel Cell w/ License Plate Filler??

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Hey guys, new to the sight. Bought a 1969 GMC C10 SWB about three months ago and have spent most of that time "cruising" this site for ideas. Unfortunately, that has turned my "budget minded, shop truck, driver" into a much more expensive, throw the budget out the window build! Lol. Hope to start a build thread soon as the truck is completely disassembled w/ parts everywhere. The question I have right now is: has anyone used a Boyd's fuel tank with the filler spout behind the license plate? I know this will make the filler very low but I am willing to deal with that. More concerned about how the filler spout will line up if the tank is raised to the top of the frame rail and how much volume is lost with the filler spout in this location. Hopefully this is clear. This is the first time I have posted on a forum like this, so if I need to do something differently, please let me know. Thanks in advance for your help. Dan